Folding inside and outside calipers and compasses



I. OR HEWETT.

FOLDING INSlDE AND OUTSHJE CALIPERS AND COMPASSES.

APPLICATION FILED MAR. B. BIB.

Patented June 3, 1919.

" UNITED STATES mmmem a1] ISAAC out. HEwE'rri', or BERKELEY smmes', wEs'r vmmm.

EoLDI'nG INsinE AND oUrs nE cAnirERs AND 'com assss.

Application filed March 8, 1918.

T 0 all whom it may concern:

- Be it known that I, ISAAC ORonnKE HEW- ETT, a citizen of the United States, residing at Berkeley Springs, in the county of Morgan, State of West Virginia, have invented a new and useful Folding Inside and Outside Calipers and Compasses; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved combination tool particularly designed for use by machinists and similar mechanics.

One of the objects of the invention is to provide combination inside and outside calipers and compass, so constructed that the inside calipers may be used as outside calipers, or the outside calipers employed as inside calipers.

A further object of the invention is the provision of a combination tool of this kind, in which the outside or inside calipers may be adjusted without disturbing the other set of calipers, provided they have been once set.

A further object of the invention is the provision of a pair of pivoted members carrying the caliper and compass elements, whereby said elements may be folded between the members when said members are closed in registration.

In practical fields the details of construction may necessitate alterations falling with in the scope of what is claimed.

The invention comprises further features and combination of parts as hereinafter set forth, shown in the drawings and claimed.

In the drawings Figure 1 is a view in side elevation of the improved combination tool constructed in accordance with the invention. I

Fig. 2 is a view in side elevation showing the pivoted members partly opened and the caliper and compass elements or tools folded.

Fig. 3 is an edge view, showing the caliper elements and the compass tools folded, and the members carrying said tool in section, Where the parts are pivotally united.

Specification of Letters Patent.

Patented June 3, 1919.

Serial No. 221,156.

Referring more especially to the drawings 1 and 2 deslgnate two members or blades,

which are pivotally uni-ted by the pivot pin 3 having the heads 4. A filling body 5 through which the pin 3 extends constitutes means to space the members or blades 1 and 2 for a purpose which is hereinafter apparent. Carried by the ends 6 and 7 of the members 1 and 2 are pivot pins 8 and 9, the outer ends ofwhich have heads 10 and the inner ends are provided with heads 11 and 12. The heads 10 of the pins 8 and 9 are countersunk in the washers 13, which are located on the outer faces of the members 1 and 2. Pivotally mounted upon the pins 8 and 9 are caliper elements 14, 15 and compass tools 16. The caliper elements 14 have curved portions 17, the ends 18 of which are designed to engage opposite points of the exterior surface of a member to be measured for gaging the distance between such points. The caliper members 15 are provided with lateral parts 19, the ends 20 of which are designed to engage opposite points of the interior of a hollow object to be measured, to gage the distance between such opposite points. It is to be noted that by reversing the members 1 and 2 to positions just opposite those shown in Fig. 1, the elements 15 may be employed as outside calipers and the elements 14 as inside calipers. When using the compass members 16, the caliper elements may be folded out of the way, and when one or the other set of caliper elements is utilized, the set that is not used and the compass elements may be folded out of the way.

The invention having been set forth what is claimed as new and useful is In a combination tool, a pair of members, means for pivotally uniting corresponding ends of said members, whereby they are foldable in either direction, said pivoting means comprising a double headed pin, washers adjacent the outer faces of the pivotally united ends of said members, and in which the heads of the pin are countersunk, a spacing member on the pin between said members for holding the same spaced, the adjacent faces of the other disconnected ends of said members having double headed name to this specification in the presence of pins,b and inside and oultside calipering two subscribing witnesses.

mem ers and a compass e ement pivotally mounted on said headed pins, whereby they H ISAAC O R HEWETT' are foldable between the pivotally united Witnessesf members. H. D. ALLEN,

In testimony whereof I have signed my J. A. RISINGER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

